Does variable flow have you climbing the walls?

You should be sitting pretty.
Hydronic systems with variable flow water distribution can be a very cost-effective way to satisfy the most demanding indoor climate requirements.
Since control in variable flow systems is chiefly obtained using two-way control valves, this can mean a significant reduction of the pumping costs that range from 6 to 12% of the chillerʼs average energy consumption at constant flow in cooling.
In addition, the plant can be designed with a diversity factor allowing for plant expansion using the same pipe work, because full load is uncommon.

So why is there cause for concern?   
In variable flow systems the differential pressure is also variable. This may destroy working conditions for modulating control valves.
Furthermore, circuits are interactive. When one control valve closes, the differential pressure on other circuits increases. Sudden load changes may cause unstable control in some control loops, spreading control problems to all circuits.
Along with complaints from angry tenants about noise from control valves and uncomfortable room temperature, unstable control can increase energy consumption by 20 to 30%. This could wipe out savings on pumping costs and lead to a nightmare of endless and expensive troubleshooting.
Fortunately, help is available.

Getting the most out of variable flow
In order to get the most out of your variable flow system, the controllers must be able to do their job. The controllers can only do this if design flows prevail in the plant when necessary. If the differential pressure varies too much, it is necessary to stabilise it to prevent incorrect flow. Thus, being able to keep differential pressure constant will improve control, ensuring comfortable indoor climates, less noise, lower start-up and maintenance costs as well as energy efficient operation.

The TA solution
TA's range of differential pressure control valves keep differential pressure constant in waterborne heating and cooling plants with variable flow. You reap three great benefits:
Accurate and stable modulating control, giving reduced energy costs.
No complaints about irritating noise
Easy balancing and commissioning, due to independent circuits.

Simply put, they help you cost-effectively optimise your variable flow hydronic system to achieve the ideal indoor climate for your building project.
Just call or drop us a line.

Any wall climbing you do should be for the fun of it!